Combined gas and oil burner



H. BARLEY Filed Feb. 21

A TTORNE Y.

COMBINED GAS AND OIL BURNER Patented Oct. 24, 1933 UNITED STATES PATENT :oFFllcs This invention relates to improvements in combined gas and oil burners, and more particularly to motor driven burners for use in heating furnaces.

Among the objects of the invention is to arrange a gas burning tuyre in combination with a vapor creating burner in such a manner that they may. operate separately, or in combination to augment the volumeand improve the combustion within the furnace. Other objects and advantages will appear as the description 1 In this specification and the accompanying drawing the invention is disclosed in its preferred form. But it is to be understood that it is not limited to this form because it may be embodied in other forms. It is also to be understood that in and by the claim following the description it is desired to cover the invention in whatsoever form it may be embodied.

In the one sheet of drawings:

Fig. l is a side elevation partly in cross-section. of a gas and oil burner combined and arranged in accordance with this invention.

Fig. 2 is an enlarged Yvertical section of the gas Fig. 3 is a fragmentary front elevation of the same.

In detail the construction illustrated in the drawing comprises the furnace front l, which will vary in different installations.

In general construction the oil burner` comprises a tight housing. 2, having a hollow shaft 3, mounted therein in suitable bearings. 'I'his shaft may be the amature shaft of a direct connected motor within the housing for driving the shaft at high speed.

An oil pump in the housing at 4 pumps fuel oil through the needle valve 5 and through the shaft 3, from whence it issues through the hole or holes 6 into the atomizing tip 7.

The fan housing 8, and cover 9, form a part of the housing 2. The fan 10 is fixed on the shaft 3l and revolves at high speed within the housing 8-9. This fan has a hollow hub ll, through which the fan creates a suction, through the housing 2, at the open end -12 and the intake 13. A butterfly valve 14 is installed in the intake 13 to regulate the volume of air admitted at 13. The air drawn through the housing 2, cools the motor and carries away any oil fumes originating in the housing at 4.

Theairblast createdbythefan loescapes from the fan housing 8-9 into the air nozzle i5 and is blown out asa forcible annular jet at 16, between the oil atomizer l and'the air nozzle l5. This jet picks oi! the atomiz'ed oil issuing from the atomizer and expands it inw a gaseous vapor which expands laterally into a vortex flame when ignited, and combustion is supported by proper admission of ventilation into the furnace, in the usual manner.

For further particulars regarding the fuel oil burner see patent to myself Number 1,655,037 dated January 3, 1928.

'Ihe gas burning tip comprises a conical tuyre 11 having the hollow chamber 13, into which the gas is piped at 19, controlled by a regulating valve. not shown. The gas issues from an annular series of small holes 20 adjacent the air outlet 16 of the oil burner. The holes 20 are preferred for practical reasons. An annular slot would serve the same purpose. The angle of these holes 20 converges to a point in front of and on the axis of the shaft 3. The air issuing at 16 is diverted outward by the flare of the atomlzing 'tip '1, which, cutting the lines of force from the holes 20, expands the gas flame laterally into a vortex which diffuses the volume of flame throughout the area of the furnace.

This apparatus `is especially adapted to thev burning of natural gas, which burns more eiliciently when well supplied with oxygen, introduced at the proper zone of combustion at the proper angle to avoid quenching the flame. It is equally adaptable to the use of commercial gas.

If an increased volume of heat is required, both the oil burner and the gas tuyre can be used simultaneously at full capacity or in proportions bestsuitedtothepurpose.. e

111e gas tuyre may be built into or attached to the furnace front, l as in Fig. 2, or it may be directly combined with the oil burner structure as shown in Fig. l. Either structure is eective so long as a working relation is properly maintained between the tuyre and the fan blower nozzle. l

Having thus described this invention what I claim and desire to secure by Letters Patent is:

A bin'ner having a hollow annular gas tuyre with an annular series of discharge openings through the forward end thereof, the axes of said openings converging at a point forward of said tuyre and on the axis thereof; a flaring fuel oil discharge tip coaxial with said tuyre and terminating behind the plane of said openings;

, and a blower having a nozzle disposed in spaced relation within said tuyre and surrounding and terminating rearwardly of the discharge end of said tip thereby providing an annular air passage between said tuyre and nozzle through which air is induced and an annular air passage between said tip and nozzle communicating with said blower.

HARRY HARLEY. 

